There is one RecentRelatedChanges for each page, listing changes to all pages "related" to this page. A few wikis just check the pages linked to:
However, using BackLinks is preferable to ForwardLinks because new pages enter a ReverseIndex category automagically. If one could tractably maintain and search a BackLinkDatabase?, this might be feasible. Alternatively, you could check BackLinks, ForwardLinks and the page itself.
A change that removes the BackLink should also be included (marked differently). This allows one to follow a specific category and PeerReview all relevant category changes. However, no subsequent changes to the page should be displayed.